Fig. 1
The flowchart of participant selection. NHIRD, National Health Insurance Research Database; N, number; CHD, coronary heart disease; OSA, obstructive sleep apnea; PSM, propensity score matching.
Fig. 1 | Scientific Reports
The flowchart of participant selection. NHIRD, National Health Insurance Research Database; N, number; CHD, coronary heart disease; OSA, obstructive sleep apnea; PSM, propensity score matching.
